131031155 has 12 divisors (see below), whose sum is σ = 167032560. Its totient is φ = 98657664.

The previous prime is 131031137. The next prime is 131031167. The reversal of 131031155 is 551130131.

It is not a de Polignac number, because 131031155 - 2⁶ = 131031091 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43895 + ... + 46784.

It is an arithmetic number, because the mean of its divisors is an integer number (13919380).

Almost surely, 2^131031155 is an apocalyptic number.

131031155 is a deficient number, since it is larger than the sum of its proper divisors (36001405).

131031155 is an equidigital number, since it uses as much as digits as its factorization.

131031155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90718 (or 90701 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 131031155 is about 11446.8840738430. The cubic root of 131031155 is about 507.9155663401.

Adding to 131031155 its reverse (551130131), we get a palindrome (682161286).

The spelling of 131031155 in words is "one hundred thirty-one million, thirty-one thousand, one hundred fifty-five".